LiftMaster 8557 8557 Manual - Page 39
Repair Parts, Rail Assembly Parts, Installation Parts
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Repair Parts Rail Assembly Parts Description 1 Belt - for 7 foot door Belt - for 8 foot door Belt - for 10 foot door 2 Belt Pulley Bracket 3 Master Link 4 One-Piece Rail 7 feet (2.1 m) One-Piece Rail 8 feet (2.4 m) One-Piece Rail 10 feet (3 m) 5 Trolley Assembly 6 Tensioner Assembly 7 Trolley Threaded Shaft Not Shown Owner's Manual Part Number 41A5434-11 41A5434-13 41A5434-14 41B5424 4A1008 2777BD 2778BD 2770BD 41B3869-3A 41B4103 109B48 114A4665 3 6 2 4 7 5 1 Installation Parts Description Part Number 1 Curved Door Arm 178B35 2 Door Bracket with Clevis Pin and Fastener 41A5047-1 3 Emergency Release Rope and Handle 41A2828 4 Header Bracket with Clevis Pin and Fastener 41A4353-1 5 Remote Control Visor Clip 29B137 6 Safety Sensor Bracket 41A5266-1 7 Safety Sensor Kit Receiving and sending sensors with 2-conductor wire 41A5034 8 Straight Door Arm 178B34 9 White and Red/White Wire 41B4494-1 10 3V2016 Lithium Battery 10A19 3 NOTICE 11 2 1 CEILING MOUNT ONLY UP 6 4 7 5 9 8 10 39
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